1213350091 has 2 divisors, whose sum is σ = 1213350092. Its totient is φ = 1213350090.

The previous prime is 1213350071. The next prime is 1213350097. The reversal of 1213350091 is 1900533121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213350091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213350097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606675045 + 606675046.

It is an arithmetic number, because the mean of its divisors is an integer number (606675046).

Almost surely, 2^1213350091 is an apocalyptic number.

1213350091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213350091 is an equidigital number, since it uses as much as digits as its factorization.

1213350091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1213350091 is about 34833.1751495611. The cubic root of 1213350091 is about 1066.5847642952.

The spelling of 1213350091 in words is "one billion, two hundred thirteen million, three hundred fifty thousand, ninety-one".